I’d give a zero if this were an option. I had FH Furr install 3 new smoke /carbon monoxide detectors in my house in just 10 short months later one starts going off and will not stop. It is wired in and has a battery backup so you can’t just pull the battery. The noise is so loud!
When I called FH Furr, they initially told me they could come out Wednesday, ~48 hours of pure noise till they could dispatch someone. Then, the representative came back on and said it would be next Tuesday, 8 days from now!!!!!! Really?!!! I don’t recommend this company to anyone for the lack of service and workmanship given how quickly this happened after installing it.